Portable boiler or heater.



No. 741,266. PATENTED OCT. 13, 1903. R, MEJLHBJUMQ PORTABLE BQILER OR HEATER.

AP'PBIQATIQIN EI HER AUG. 19,.1902.

N0 MQDHL- 2 SHEET8SHEET 2.

WITNESSES INVENTOI? %,%%W By I RObM/Wdr5 5o casing a.

UNITED STATES Patented October 13, 1903.

PATENT Urrrcn,

PORTABLE BOILER OR HEATER.

SPECIFICATION forming part of Letters Patent N 0. 741,266, dated October 13, 1903.

' Application filed August 19, 1902. Serial No, 120,200. (No model.)

To all whom it may concern:

Be it known that I, ROBERT MELDRUM, a subject of the King of Great Britain, residing at Kirkliston, in the county of Linlithgow,

Scotland, have invented certain new and useful Improvements in Portable Boilers or Heaters, of which the following is a full and complete specification, such as will enable those skilled in the art to which it appertains to make and use the same.

I 5 construction of boilers of this class and to render the same more effective and practical, a further object being to provide a boiler or heater of the class specified with an oil furnace or burner and to avoid the smoke prodzo ucts from burners and furnaces of ordinary type and to adapt the same for use either within or without a building and to make the same lighter and more durable; and with these and other objects in view the invention 0011- sists in a portable boiler or heater constructed as hereinafter described and claimed.

The invention is fully disclosed in the following specification, of which the accompanying drawings form a part, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which- Figure 1 is a side elevation of a portable boiler or heater constructed according to my 3 5 invention; Fig. 2, a vertical section on the line 2 2 of Fig. 4; Fig. 3, a vertical section on the line 3 3 of Fig. 4; Fig. 4, a transverse section on the line 2 2 of Figs. 1 and 2; and Fig. 5, a view similar to Fig. 2, but showing a modifi- 4o cation.

In the practice of my invention I provide a casing a, which is shown in the drawings as cylindrical in form, but which may be of any desired shape or form. The casing a is open at the top and is provided in one side thereof with an opening which in the form of construction shown is closed by a plate or door I), held in place by vertically-arranged keepers and a bottom keeper b secured to the The connection of the door Z) with the casing to, however, may be made in any desired manner, and the said door is preferably made more convex than the wall of the furnace, so as to admit air at the top, or a central register I) for the admission of air may be provided, if desired. Within the casing a is placed a supplemental or furnace casing c, which in the form of construction shown is provided with a top flange 0 which rests on a corresponding flange a at the top of the casing a and is preferably secured thereto by bolts or screws 0 or in any desired manner, or the supplemental furnace may simply rest 011 the casing a.

The supplemental or furnace casing c is tapered downwardly and inwardly, the lower end thereof being substantially less in size or diameter than the'casing a while the upper end of the casing c is substantially as large as the upper end of the casing a and said casing 0 also shorter than the casing a, and by means of this construction a chamber d is formed in the casin g a, which incloses the casing 0 and extends upwardly around the sides thereof to the top thereof.

The openings a and c in the adjacent sides of the casings a and c are inclosed by casing d of any desired construction, and this casing may be formed integrally with the parts a and c or be formed separately and secured thereto, and by means thereof the chamber cl is closed at all points from the openings 0* and a Within the top of the casing c is placed a pot or kettle 6, having a flange e which rests on the top of the flange o of the casing c and is preferably secured thereto by the bolts or screws 0 and the pot or kettle e is provided with a cover 6 which may be connected therewith in any desired manner or be made simply so as to rest thereon.

Within the casing c is a partition or diaphragm 0 having a slot or opening a, which extends to the opening 0, and by means of this diaphragm or partition 0 a chamber 0 is formed in the bottom of the casing c, which is adapted to receive an oil-reservoir j, which may be inserted through the openings a and c and which is provided with burners or burner-tubes f which extend up through the slot or opening 0 in the diaphragm or partition and the said reservoir f and burnerg and the top portion of the casing ais pro-.

vided with a tube h, through which the chamber (Z may be filled, and the bottom of said casing is provided with a draw-off tube or pipe 71 through which the contents of said chamber 61 may be exhausted.

In practice in heating liquids both .the pot or kettle e and chamber (1 are filled with the liquid to be heated, and while the contents of the pot or kettle e are being heated to the desired extent the contents of the chamber (1 are also being heated, or partially so, and when the contents of the pot or kettle e have been heated to the desired extent the said pot or kettle may be emptied and the contents of the chamber cl be drawn out and placed in the pot or kettle e and said chamber d may be refilled, and by means of this construction and operation all the heat of the furnace is utilized, as will be readily understood, there being no heat lost by radiation, thus saving time and fuel.

In using my improved boiler or heater for melting pitch, resin, and like substances the said substances are placed in the pot or kettle e, and in this case liquids may be heated at the same time, if desired, in the chamber d, and if said chamber is not devoted to this use it will serve to prevent radiation, and thus conserving the heat generated in the furnacechamber by the burner or burners placed therein.

A boiler or heater constructed in this way may be made of much lighter material than when coal or wood is used as a fuel, and the said boiler or heater may be made of any de: sired shape-oblong, cylindrical, or square in cross-section-and if made oblong any desired number of furnace-chambers may be employed, it being understood that any suitable oil burner and supply device may be employed, that which is herein shown and described being only to indicate such devices.

In Fig. 5 of the drawings I have shown a modification in which the casing a is provided at "about one-third of thedistance from the bottom thereof with a partition-plate 7e,

rests 011 the flange or rinr a of the casing a and on which is supported a kettle e, which is provided with the cover 6 these parts being exactly the same as those shown in. Figs. 1 to In this form of construction the supplemental casing m is tapered inwardly and downwardly, as in Fig. 2, but the bottom thereof is secured to partition-plate It so as to form an annular chamber a between said supplemental casing and the outer casing a, and this chamber is of greater transverse dimensions at the bottom than at the top, and inpractice the said chamber is designed to receive liquids which may be placed therein through a pipe 0 and withdrawn therefrom through a faucet 0 Within the bottom chamber k is placed the oil-reservoir f, having burner-tubes f the same as the construction shown in Fig. 2. These burner-tubes pass upwardly through the central opening 762 in the partition-plate lo and around the top of the apparatus, and preferably in the top flange or member of the kettle e is formed escape-passages p for the products of combustion, as shown in Figs. 1 and 5.

Any suitable means may be provided for admitting air into the chamber k and in the operation of this form of construction substantially the same as has been hereinbefore described with reference to the construction shown in Figs. 1 to 3.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A portable furnace or heater, comprising a main outer casin g open at the top, a supple-' mental casing placed therein and supported v at the top thereof, said supplemental casing being open at the top and being tapered downwardly and inwardly and being shorter than the main outer casing whereby a chamber is formed in said main outer casing which incloses the supplemental casing, said main and supplemental casings being also provided in their adjacent sides and at the bottom of the supplemental casing with openings which are closed or cut off from said chamber, and through which a furnace burner may be passed into the supplemental casing, and a pot or kettle placed in the top of the supplemental casing and supported thereon, substantially as shown and described.

2. A portable furnace or heater, comprising a main outer casing open at the top, a supplemental casing placed therein and supported on the top thereof, said supplemental casing being open at the top and being tapered downwardly and inwardly and being shorter than the main outer casing whereby a chamber is formed in said main outer casing which incloses the supplemental casin g, said main and supplemental casings being also provided in their adjacent sides and at the bottom of the supplemental casing with openings which are closed or out off from said chamber, and through which a furnace burner may be passed into the supplemental casing, and a opening, a kettle within the top of the sup-' plen1entalcasing,and suspended thereon,and a removable burner supported beneath the bottom of the chamber in which said kettle is placed substantially as shown and described. In testimony that I claim the foregoing as my invention I have signed my name,in presence of the subscribing witnesses, this 5th day of August, 1902..

ROBERT MELDRUM. [L. s] Witnesses:

WM. H. DOUGALL, T. A. MENZIES. 

